The authors report compelling evidence for the formation of a fourth type of helical secondary structure of a beta-peptide in MeOH, and this phenomenon occurs if each amino acid has a hydroxy group in the 2-position. 2D-NMR expts. of terminally-protected beta-hexapeptide I were conducted to obtain its secondary structure information.
Jacques Fellay, Konstantin Popadin
Matteo Dal Peraro, Luciano Andres Abriata